KR940008213A - Battery protection circuit - Google Patents

Battery protection circuit Download PDF

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Publication number
KR940008213A
KR940008213A KR1019930018607A KR930018607A KR940008213A KR 940008213 A KR940008213 A KR 940008213A KR 1019930018607 A KR1019930018607 A KR 1019930018607A KR 930018607 A KR930018607 A KR 930018607A KR 940008213 A KR940008213 A KR 940008213A
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KR
South Korea
Prior art keywords
state
power
protection circuit
battery
battery protection
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Application number
KR1019930018607A
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Korean (ko)
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KR100298248B1 (en
Inventor
야스히도 에구찌
간지 무라노
아끼라 산페이
하지메 다미야
Original Assignee
오가 노리오
소니 가부시기가이샤
히사도메 이사무
니폰 모토롤라 가부시기가이샤
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Application filed by 오가 노리오, 소니 가부시기가이샤, 히사도메 이사무, 니폰 모토롤라 가부시기가이샤 filed Critical 오가 노리오
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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0014—Circuits for equalisation of charge between batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits

Abstract

복수의 2차전지를 직렬로 접속한 배터리를 보호하는 배터리보호회로에 각 2차전지의 충전, 방전에 의한 배터리의 성능열화를 방지하는 회로군을 배설하여 배터리의 수명을 연장하는 것을 목적으로 한다.An object of the present invention is to provide a battery protection circuit that protects a battery in which a plurality of secondary batteries are connected in series, and a circuit group for preventing performance degradation of the battery due to charging and discharging of each secondary battery, thereby extending the life of the battery.

배터리보호회로내에 전지가 과방전상태로 된 경우에는, 최소한의 회로에만 전류가 흐르도록 하여, 잔존용량의 전원이 0V로 되는 시간을 될 수 있는 한 길게 하는 파워다운수단을 설치하는 동시에, 순간적인 과전류 등의 장해를 검출해도 파워다운모드로 되지 않도록 구성한다.When the battery is in an over-discharge state within the battery protection circuit, a current is supplied only to the minimum circuit, and a power-down means is provided to lengthen the time for which the power of the remaining capacity becomes 0V, and at the same time, It is configured not to enter the power down mode even when a fault such as an overcurrent is detected.

Description

배터리보호회로Battery protection circuit

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명에 관한 배터리보호회로의 전체블록다이어그램도.1 is an overall block diagram of a battery protection circuit according to the present invention.

제2도는 배터리방전특성을 그래프로 도시한 설명도.2 is an explanatory diagram graphically showing battery discharge characteristics.

제3도는 전체의 회로도.3 is an overall circuit diagram.

제4도는 파워 MOS 트랜지스터의 그라운드(GND)의 형태를 도시한 설명도.4 is an explanatory diagram showing the shape of the ground GND of the power MOS transistor.

제5도는 제4도에 도시한 그라운드(GND)를 시프트하여 동전위로 하는 소위 그라운드레벨시프트의 예를 블록도로 도시한 설명도.FIG. 5 is an explanatory diagram showing an example of so-called ground level shift in which the ground GND shown in FIG. 4 is shifted to a coin position.

Claims (8)

2차전지와, 이 전지의 전압을 검출하는 동시에, 이 검출전압과 기준전압을 비교하여 상기 2차전지의 과방전상태 또는 과충전상태를 검지하는 상태검지수단과, 방전전류 또는 충전전류를 차단하기 위한 제1 및 제2의 스위치수단과, 상기 상태검지수단의 검지결과에 의거하여 상기 제1 및 제2의 스위치수단의 도통(導通) 및 비도통을 제어하는 제어수단과, 상기 상태검지수단에 공급하는 전원 및 기준전압원을 차단하기 위한 파워다운스위치수단과, 상기 상태검지수단에 의해 과방전상태가 검지된 경우에 상기 파워다운스위치수단을 비도통상태로 하는 파워다운수단과, 과방전상태로부터 다시 충전이 개시된 경우에 상기 파워다운스위치수단을 비도통상태로부터 도통상태로 복귀시키는 파워다운해제수단을 구비한 배터리보호회로에 있어서, 상기 과방전상태로부터 상기 충전개시의 상태를 상기 2차전지의 단자간에 충전전압이 발생함으로써 검출하고, 검출된 충전상태를 유지하는 상태유지수단을 구비한 것을 특징으로 하는 배터리보호회로.A secondary battery and a state detecting means for detecting the voltage of the battery and comparing the detected voltage with a reference voltage to detect an overdischarge state or an overcharge state of the secondary battery, and to cut off a discharge current or a charge current. Control means for controlling conduction and non-conduction of the first and second switch means on the basis of the first and second switch means for switching, based on the detection result of the state detection means, and the state detection means. Power-down switch means for shutting off the power supply and the reference voltage source to be supplied, power-down means for making the power-down switch means non-conductive when the over-discharge state is detected by the state detection means, and from the over-discharge state. A battery protection circuit comprising power down release means for returning said power down switch means from a non-conduction state to a conduction state when charging is started again, said over-discharge And a state holding means for detecting the state of the charge start from the state by generating a charge voltage between the terminals of the secondary battery and maintaining the detected state of charge. 제1항에 있어서, 상기 상태유지수단은 상기 2차전지의 전압이 과방전영역을 탈출하기까지 상기 충전상태를 유지하는 것을 특징으로 하는 배터리보호회로.The battery protection circuit according to claim 1, wherein the state maintaining means maintains the state of charge until the voltage of the secondary battery escapes the overdischarge region. 제2항에 있어서, 상기 2차전지가 복수 직렬로 접속된 배터리보호회로에 있어서는, 상기 파워다운수단은 상기 상태검지수단에 의해 최소한 하나의 상기 2차전지의 과방전상태가 검지된 경우에 상기 파워다운스위치수단을 비도통상태로 하는 것을 특징으로 하는 배터리보호회로.The battery protection circuit according to claim 2, wherein in the battery protection circuit in which a plurality of secondary batteries are connected in series, the power-down means includes the power when the over-discharge state of at least one secondary battery is detected by the state detection means. A battery protection circuit comprising the down switch means in a non-conductive state. 제2항에 있어서, 상기 파워다운해제수단은 상기 상태검지수단에 있어서의 기준전압용 파워다운스위치수단을 먼저 도통상태로 하고, 기준전압의 발생을 검지하고나서 다른 파워다운스위치수단을 도통상태로 하는 것을 특징으로 하는 배터리보호회로.3. The power-down release means according to claim 2, wherein the power-down release means first turns on the power-down switch means for the reference voltage in the state detection means, and detects the occurrence of the reference voltage, and then turns the other power-down switch means to the conduction state. Battery protection circuit, characterized in that. 제1항 또는 제3항에 있어서, 상기 파워다운스위치 수단이 비도통시이고, 상기 2차전지의 전압이 대략 0V의 경우는, 강제적으로 상기 2차전지 충전가능상태로 하는 강제수단을 구비한 것을 특징으로 하는 배터리보호회로.4. The power down switch means according to claim 1 or 3, wherein the power down switch means is in a non-conduction state, and when the voltage of the secondary battery is approximately 0 V, it is provided with a forcing means for forcing the secondary battery to be in a chargeable state. Battery protection circuit characterized in that. 제3항에 있어서, 어느 하나의 상기 2차전지가 과충전상태의 경우는, 상기 파워다운스위치수단이 비도통상태로 되지 않도록 하는 파워다운금지수단을 구비한 것을 특징으로 하는 배터리보호회로.4. The battery protection circuit according to claim 3, further comprising a power down inhibiting means for preventing the power down switch means from being in a non-conductive state when any one of said secondary batteries is in an overcharged state. 제1항, 제3항 또는 제6항에 있어서, 순간적으로 대전류가 흐른 경우에는, 이 대전류를 검출하는 과전류검출 수단을 설치하고, 이 과전류검출수단의 검출신호에 의거하여 상기 파워다운스위치수단이 비도통상태로 되지 않도록 파워다운금지수단을 구비한 것을 특징으로 하는 배터리보호회로.The power down switch means according to claim 1, 3 or 6, wherein when a large current flows instantaneously, an overcurrent detecting means for detecting the large current is provided, and the power down switch means is based on a detection signal of the overcurrent detecting means. A battery protection circuit comprising a power down inhibiting means so as not to be in a conduction state. 제3항에 있어서, 복수의 상기 2차전지의 전지밸런스를 취하는 수단을 구비한 것을 특징으로 하는 배터리보호회로.4. The battery protection circuit according to claim 3, comprising means for taking battery balance of the plurality of secondary batteries. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930018607A 1992-09-17 1993-09-16 Battery protection circuit KR100298248B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP92-274,945 1992-09-17
JP27494592A JP3291530B2 (en) 1992-09-17 1992-09-17 Battery protection circuit

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KR940008213A true KR940008213A (en) 1994-04-29
KR100298248B1 KR100298248B1 (en) 2001-10-24

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US (1) US5493197A (en)
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JP (1) JP3291530B2 (en)
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JP3291530B2 (en) 2002-06-10
EP0588613B1 (en) 1998-02-04
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KR100298248B1 (en) 2001-10-24
EP0588613A2 (en) 1994-03-23
EP0588613A3 (en) 1994-09-28
US5493197A (en) 1996-02-20
DE69316812D1 (en) 1998-03-12
JPH06104015A (en) 1994-04-15

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